Auxiliary hot air heater



'- *,1. BUCKLEY AUXILIARY HOT AIR HEATER Jun 12,'1945.

2 Sheets-Sheet l Filed Dec.

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Patented June 1.2, 1945 UNITED STATES PATENT OFFICE AUXILIARY Hor Am HEATER Joseph Buckley, Methuemmass. Application December 10, 1943, Serial No. 513,709

` 2 claims. (c1. 12e-10s) This invention relates to devices for utilizing a greater percentage of the heat from a house heater in heating the house and in providing `clean fresh hot air to the room or rooms thereof.

In steam and hot water systems, whether of the forced draft, oil or gas type, or the coal type, after heating the steam or the hot water it is conducted to the room or rooms to be heated while a large proportion of the heat produced escapes up the chimney as waste and is lost.

The main feature of my device is what I will -call asecondary hot air heater, heated from the products vof combustion from a primary heater, of such a character that a large part of the waste or exhaust heat. is u'sedrin heating clean air which is conducted to a room or rooms to be heated.

It may be used-witha primary hot air heater,Y a steam or hot water heater of any of the forcedy draft types or it may be used with .primary heaters which are not of the forced draft type. It may also be used in the same enclosure with a primary heater -or in a separate enclosure.

It may also be used in connection with such heaters located in a cellar or basement or it can be used in connection with a primaryl heater of the direct type, such as a stove, both located in a room to be heated.

It is necessary to ke'ep the clean air which is to be delivered tothe room to be heated separate from the dirty or foul air containing the products of combustion from the primary heater and the main feature of my device is the provision of a receiving drum which is inside the enclosing shell for the clean hot air and which receives the products of combustion from a primary heater, and which on its insiderhas .a removable drum which might be called a dead air or clean out drum, the parts being so arranged that When soot forms, this inside remov able drum can be lifted up or out and it and the surrounding parts can then be leasily and thoroughly cleaned.

The fundamental purpose of this device is to utilize the heat of the products of combustion from some primary heater by carrying them down around and between concentric drums or chambers positioned inside a clean hot air chamber with preferably the inside drum containing dead air or products of combustion While between the drums, the live products of combustion travel downward and then out after losing a large part of their heat to the clean air chamber.

Preferably I utilize the fact that with heating means of the forced draft type, such asv used with oil and such as is produced by gas, it is not necessary to heat the chimney by the products of combustion to produce the draft. However, my secondary hot air heater can be used with ordinary fuel and an ordinary fire pot provided with a heating dome.

The special features of my device are that the hot foul air and hot gases travel from a primary heater through a clean air chamber to the top of a secondary heater and in there, instead of going directly to a smoke outlet, they travel around an annular space betweenv an outside drum and "a concentric inside drum thereby distributing the heat to and utilizing it by conduction through the outside drum into the clean air chamber.

These concentric drumsV and this arrangement of inlets and outletsprevent the formation of and break up any direct currents of the products of combustionY which `would waste heat.

At the same time the foul air is kept away from the clean air. Soot and dirt can settle on the bottom of the secondary drum but it and all other parts including the clean air chamber can easily be reached for cleaning.

In the drawings,

Fig. 1 is a vertical sectional view as on the line I-l of Fig. 4.

Fig. 2 is a detail of one of the separating lugs and Fig. 3 is adetail of one type of burner for a primary heater.

Fig. 4 is a sectional view looking down on the irregular line 4--4 of Fig. l.

Fig.5 is an elevational view of another embodiment of my device. Y

Fig. 6 is a sectional view looking down on the irregular line E-G of Fig. 5. Fig. 7 is a vertical sectional view'as on `the 4 une 1 1 of Fig. 6.

Fig. 8 is a view similar to Fig. 7 of a modification.

- In the drawings, 3l represents a door which as shown coincides with the ceiling of the basement B and with the iioor of Va room such as R to be heated and in whichthere may be a regover secondary hot air heater A has a clean out opening 39' on which rests a cover 8 with a handle 1.

As shown in Figs. 1 and 2, a primary hot air heater P positioned in chamber' D may have a heating dome I with relatively thin metal walls II except at the bottom I2 where it is formed as a lined firepot. It may have a clean out door I3 and an opening I4 to receive the iire nozzle 4 from heating means F shown as of any common oil burning type having a casing I, oil

. inlet 2, and blower i'an 3 driven by any suitable This secondary hot air heater A is of cylindrical or drum shape and includes an` outside drum 22 with an air and gas tight bottom 31 and a removable cover 23 with a handle I1 and a concentric inside dead air drum 24 which rests on bottom 31 and which can be taken out of outside drum 22 by means of a handle 25 after lifting oil the cover ;6 of the clean hotair chamber D and cover 23 of drum 22.

Drum 24 is removable as a complete unit.

There may be settling holes 26, 28 inits top which allow a certain amount of products of combustion to settle on bottom 3-1 andlprevent heated( air in drum 24 from causing drum 24 to be lifted or to chatter when the re is ilrst started or heats up this drum unusually fast.

Drum 24 is spaced concentrically inside drum 22 by spacing lugs 20 held in place on drum 24 by screws I20as shown in Fig. 2.

, The whole inside of the clean hot air chamber and of the primary and secondary heater can easily be reached for cleaning by means of the removable covers 6 and 23, the clean out door I3, and clean out door 21 which closes or opens a passage 28 into drum 22 and by lifting out drum F, I can use a gas burner with a nozzle such as' 8 shown in Fig. 3. which connects with the pressure gas supply of a city which,l in the combustion chamber 80, is mixed with air entering through air holes 5 thus providing heat for the primary heating chamber P through opening I4. As shown in Figs. 5, 6, and '1, I can use a rectangular clean hot air chamber such as G in which is a primary hot air heater H and a secondary hot air .heater K. Chamber G has four walls 40, 4II, 40, 4 and as shown has a bottom 4I and is suppor d on legs -42, 42 there being a plurality of clean air inlets 43, 43, in the bottom. It is provided with a removable cover 44 which as shown, has an outside fiange 4.5 which fits over the top of the walls This primary hot air heater H may ybe heated.

by gas in a manner similar to what is shown in Fig. 3 or a range oil heating device of any well known construction including a. burner with feed pipe 5I running from a gravity tank 52 can be used. The air to be burned comes. into the fire box 48 through the air holes 53, 53, in bottom 4I, and air holes 1I in bottom 10 and out into secondary heater K through a smoke pipe 46.

A'lhe secondary heater K issimilar inl construction to A. It includes an outside drum B0 with thin metal Walls 6I and a gas tight bottom 12 which rests on the bottom 4I of the device. It

has a removable cover 82 and the inside dead ai!" drum 63. This dead air drum 63fhas a fixed cover 64 with air holes 85 and a handle` B6. Itl ,can be removed as a unit in the same manner as the drum 24.

It is spaced from walls 6l of the outside drum BI) by lugs 68, 68.

In Fig. 8, I show a construction which can be The smoke pipe L enters near the top of drum 82 part of secondary heater N which includes this outside drum 82 with a removable cover 83 and an inside drum 84 which itself is removable, the products of combustion continuing down and between' the two drums and, out at the 'bottom through an exhaust pipe 85 as to a chimney.

I claim: 1

1. For use in supplying clean hot air to the rooms of a. house having a basement; a hot air heating assembly adapted to be positioned in the basement and including an outer clean air shell forminga clean hot air chamber having clean air inlets proximate its lower partand a clean hot air outlet in its top part; a conductor from said clean hot air outlet to a room to be heated; a iire A box including a heating dome forming a primary hot air heater with a smoke outlet near the top of the dome and being located within and spaced from the walls of the clean hot air chamber and being sealed from said clean hot airchamber;

K heating, means for heating the iirebox with ay forced draft; a. removable cover forl part of the top of the clean hot air chamber; a secondary hot air heater including an outside drum spaced'- froin the wall of the clean ho't air chamber and having a removable cover under the. cover of the clean hot air chamber, and a removable dead air drum having a perforated top and being inside the outside drum of the secondary hot air heater and the dead air drum of the secondary heater through the cleanhot air chamber.

4I, 40, 4l. 40, the cover having clean air passages 14 to allow the heat to escape and also has a' primary hot air heater H with a bottom 10. 'l

2. For use in supplying clean hot airto a house;

a hot air heating assembly including an outer clean air shell forming a clean hot air chamber having clean air inlets proximate its lower part and a clean hot air outlet in its top part; a'iire box including a heatingdome forming a primary hot air heater'wlth a smoke outlet near the t0n of the dome and being located within and spaced from the-walls of the clean hot air chamber and being sealed from said clean hot air chamber; a

removable cover for part of the top of the clean hot air chamber; a secondary hot air heater 1ncluding an outside drum spaced from the wail o! the clean hot air chamber and having a removable cover under the cover of the clean hot air.

chamber, and a removable dead air drum having 10 ,s perfumed .am ma han; mme um @mae drum ot the secondary hot sir' heater and conoentrically spaced from the walls thereof a smoke pipe connection between the iire box smoke outlet and the secondary heater near the top ot both; and a smoke exhaust pipe from near the bottom of the space between the outside drum and the` dead air drum of the secondary heater throughthe clean hot air chamber.v

; JOSEPH BUCKLE?. 

